openstack team mailing list archive

[Angus Salkeld <asalkeld@xxxxxxxxxx>]

On 24/07/12 12:12 -0700, Steven Dake wrote:
> On 07/24/2012 10:08 AM, Alessandro Tagliapietra wrote:
> > But i don't see any part (except the future plans) talking about HA at instance level, that seems more to an application level
>
> Currently heat's healthchecking is application only, but we do intend to
> improve instance healthchecking in v6.  We are currently in our v5
> development which concludes on July 30th.  We have 4-5 week development
> windows.  I'll make certain vm healthchecking is solid for v6 around
> August.  However, we may be able to fit into v5 - I'll have to check
> with the main author of the HA feature (Angus Salkeld).

I have just added a template demonstating an instance sending
healthchecks and getting restarted if it fails to send a healthcheck
within a specified period.

https://github.com/heat-api/heat/blob/master/templates/WordPress_Single_Instance_With_IHA.template

(just to give you another option).

-Angus

> The HA feature HOWTO is described a bit here:
>
> https://github.com/heat-api/heat/wiki/Using-HA
>
> An example HA application template is here:
>
> https://github.com/heat-api/heat/blob/master/templates/WordPress_Single_Instance_With_HA.template
>
> This template launches a wordpress cloud application.  If httpd or mysql
> fail, they are restarted.  If they fail 3 times in 5 minutes, the entire
> VM is restarted (this is called escalation) under the assumption that
> the VM container is defective in some way.
>
> Regards
> -steve
>
> > Il giorno 24/lug/2012, alle ore 18:56, Jay Pipes ha scritto:
> >
> > > On 07/24/2012 12:52 PM, Alessandro Tagliapietra wrote:
> > > > Thank you Jay, never read about that.
> > > > Seems something like scalr/chef? WHich handles application and keeps a minimum number of vm running?
> > >
> > > Yeah, kinda.. just one more way of doing things... :)
> > > -jay
> >
> >
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